Type-writing machine.



W. Y. FORBES & W. H. B OTHWELL. TYPB-WRITIlG MAUHINE.

961,598, t Patented June14,1910.

, "rf/Eames,

UNITED STATES T OFFICE.

WILLIAM Y. FORBES AND WILLIAM H. ROTHWELL, OFIHUYTON, LIVERPOOL,

ENGLAND.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented. June 14, 1910.

To all whom 'it may concern:

Be it known that we, VVLLLIAM YUILE 'FORBES and WILLIAM HAs'rrNcsROTHWELL, both-subj'ectsof the King of Great Britain and Ireland,residing at Lynwood, Huyton, Liverpool, England, have invented a new anduseful Improvement in Type-Writing Machines, of which the following is aspecification.

This invention has reference to typewriting machines, and relates tocert-ain arrangements of mechanism connected with shiftkey mechanism forrocking the platen carriage frame about its pivots; and a shiftkeylocking'arrangement, whereby a shiftkey may be locked and unlocked.

In the annexed drawing :-Figure 1 is a side View showing the portions ofa typewriting machine material to this invention. Fig. 2 1s a part planof Fig. 1. Fig. 3 is an end View of a portion of the mechanism shown inFig. 1. Fig. 4 is a front view of the shift-key locking arrangementaccording to this invention, the scale of this ligure beig twice that ofthe other figures.

e grooved rollers 14 which run upon the two parallel traversing rods 15.

Small letters, capitals, and ligures are borne by each type block, andin order that either of these may make an impressionl as desired theframe 46 carrying the rods' 15 upon which the platen carriage travels,is caused to rock about its pivots 47 by means of the shift-key levers48 and 49. These' levers are-coupled by the links 50 and 51, re-.

speetively, with the double bell lever 52 xed on the spindle 62, thethird limb 63 of this lever and a corresponding arm 64 at the other sideof the machine being coupled by the. adjustable rods 53 With suchrocking frame 46. The travel of the rocking frame 46 is limited by thestops 54 on the yoke rod 55. The shift keys 56 and 57, for capitals' andfigures respectively, are capable of being depressed momentarily or ofremaining depressed, by the manner inv whichthe key is `touched.'Eachkey, 56, 57, is .arranged to platen carriagev 13 travels upon- 59,in a striking plate (i0 on the base plate of` the machine. That is tosay, when touched toward one Side thereof, the key will not rock uponits pivot, and the hooked finger 58 Will not engage With the strikingplate 60, but if touched toward the other side thereof, the key willrock on its pivot and the finger 58 Will engage with the striking plate60 and will hold such key7 and its lever in their depressed position.Similarly, when a key is locked in its depressed position, it isunlocked by touching .it upon that side which will canso it to rock onits pivot. The foregoing description applies to both of the shift keys5G, 57. The hooked finger 58 is normally kept out of engagement with thestriking plate 60 by the spring 6l.

Having now described our invention,wliat We claim asnew and desire tosecure by Letters Patent is 1. In a typcwriting machine, `incombination, a frame pivoted on the machine base and supporting theplaten carriage, two' shift-key levers for'v rocking said frame ineither direction about-,its pivots, a double bell-lever and single levermounted on the same spindle, and rods connecting the shiftkey leversWith suchdouble bell-lever and connecting such double bell-lever andsingle lever With said frame, yoke rods connected to the machine frameand passing through lugs on said rocking frame, and adjustable stoppieces on said yoke rods for limiting Y the movements of said rockingframe, substantially as described.

2. In a typewriting machine, the combination .with shift-key levers forrocking the laten carriage frame so as to produce difilerent caselettering, of key tablets pivoted on the ends of said leversandtarranged' to lets, and

rock sidwise thereon, hook-shaped finger pieces dpending from said -tanotched striking plates standing on the maarv chine base plate, wherebya touch appliedvl 'noteh of one of said striking g named on one Side ofeither of said tablets causes it with said striking .pla-tes,substantially as to rock and so enter its hooked linger in thedescribed. A

plates, so that the shift-key lever is retalned in its de l'essedposition and is released therefrom y a touch directed onthe oploste sideof said tablet, and springs for oldng said hooked fingers normally outof engagement W. Y. FORBES. W. H. ROTHWELL.

Witnesses:

JAMES A. CONBROUGH, WM. BLANCHARD.

